Improved high precision RDSS time service method

Abstract

The invention discloses an improved high precision RDSS time service method. On one hand, the method herein overcomes the calculation method of traditional RDSS time service receiver which utilizes the position and velocity of satellites at integral and fractional points in calculating satellite position by adopting an improved method in calculating satellite position; on the other hand, the method herein increases Doppler frequency shift in correcting impact on the RDSS time service so as to substantially increase the precision of time service; the improved method herein, through our test analysis and research demonstration, can increase the time service precision of traditional time service receiver from 50 ns to better than 10 ns, and overcomes the precision bottleneck of the RDSS time service. Therefore, the method herein achieves a breakthrough development and has great application potential and economic benefits.

Description

technical field [0001] The invention relates to RDSS timing technology, in particular to an improved high-precision RDSS timing method. Background technique [0002] RDSS (Radio Determination Satellite Service) has provided positioning and timing services for more than 10 years, and is widely used in communications, electric power, commerce, and national defense construction. Its timing service accuracy is 50ns. [0003] The working principle of RDSS timing is as follows: Different from the design of satellite navigation systems such as GPS based on the time reference of spaceborne atomic clocks, the RDSS time reference uses a ground-based high-precision atomic clock, which has higher time reference accuracy. In addition, the RDSS constellation uses GEO satellites to serve China and surrounding areas. The transmission path of the RDSS timing signal is forwarded from the ground center station to the ground user through the satellite (where, f 1 and f 3 is the frequency o...

AI Technical Summary

Problems solved by technology

[0004] The traditional RDSS timing receiver uses the satellite speed to estimate the satellite position, and then calculates the downlink delay and corrects the uplink delay; on this basis, it performs error corrections such as atmospheric delay, hardware zero value, and earth rotation correction, and the timing accuracy is about 50ns. With the improvement of users' requirements for accuracy, the disadvantages of the existing timing accuracy become more and more obvious

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